Milling-machine.



B. M. W. HANSON.

MILLING MACHINE.

xvmcmm FILED NOV. ma 1915.

SHEET 1.

Patmfvd June 20, 1916.

3 S H EETS Y Pun-mm Julie 20, 1910.

Q SHEETSSHEEI Z.

B. M. W. HANSON.

MILLING MACHINE.

APPLICATION FILED NOV. Is. I9I5.

1 1 87,730 Patented June 20, 1916.

3 SHEETS-SHEET 3.

Invenfnr by the motion of the carriage or slide.

UNITED STATES PATENT OFFICE.

BENG'I' W. HANSON, 0F HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT & WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

MILLING-MACHIN E.

Specification of Letters Patent.

Patented June 20, 1916.

Application filed November 18, 1915.- Serial No. 62,208.

To all whom it may concern:

Be it known that I, BENGT M. W. HAN- SON, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Milling-Machines, of which the following is a specification.

This invention relates to what I shall for convenience term a milling machine. As noted I have selected the title in question as a matter of convenience and for the reason that some or all of the features of the invention can with advantage be incorporated in other kinds of metal working machines.

In my contemporaneously pending application, SerialNo. 865,856, filed October 9, 1914, I have represented a metal working machine having a reciprocatory carriage, in the form of a slide, adapted to support work and means for supporting a tool in operative relation with the work, the construction being such that at the conclusion of a cut the work up to that timein elevated relation is automatically lowered so that as the carriage or slide is moved backward the work can not come into contact with the tool. The lowered relation of the work is maintained until before a second cut is to be made at which time the work is moved into position to be acted upon by the tool as the carriage advances, and this particular condition ensues until as intimated the second cut is finished. In the prior application there are, as will be inferred, certain broad relations, and while the form of embodiment of machine disclosed in said application is highly advantageous, the present machine has been designed to meet certain requirements. In the prior application both movements of the work with respect to the tool were governed The present machine comprises all the advantages of that set forth in said prior application, but in the present case I provide means independent of thecarriage or of the motion thereof for effecting automatically the receding of the work or its movement away from the tool at the finish of a tooling oper--.

ation. I may,-'and prefer to have the advance or elevation of the work toward the cutting plane shall be under the control of the car" riage, although this may not in all cases be necessary as will be obvious.

p In the drawings accompanying and formdepart therefrom in several respects within the scope of the invention defined by the claims following said description.

Referring to said drawings: Figure 1 is a longitudinal section partly. in elevation of a milling machine involving my invention. Fig. 2 is a sectional detail of the engaging portion of the wedge members. Fig. 3 is a like view of the lower wedge, a portion of the carriage and means for effecting the elevation of said wedge member, certain of the parts being shown in different positions by full and dotted lines respectively. Fig. 4 is a transverse section on the line 4A of Fig. 1, looking in the direction of the arrow. 'Figs. 5 and 6 are transverse sections on the lines 55 and 66 respectively of Fig. 1, also looking in the direction of the arrows. Fig. 7 is a top plan view of a cam drum, the stud of the carriage being shown in dotted lines. This view also illustrates in section part of a lever carried by the main slide and the stud whichcoacts therewith. Figs. 8 and 9 are detail views of the cutter and Work showing by arrows the motionpf the parts and the work in its advanced and retracted positions.

Like characters refer to like parts different scales.

The different parts of the machine may be supported by any suitable framing, the base or bed 2 being shown for this purpose. In the upper side of said base or bed are ways to receive for sliding movement the carriage or slide 3 which advances toward the right in Fig. 1 and retracts toward the left in-said view. The base also carries the support 4 for a cutter as 5 which may be rotated in any desirable manner.

The foregoing is a concise demription of a familiar type of milling machine. -As will be inferred, myimprovements can be incorporated in. machines of this kind or in others.

Below the carriage or'slide 3 is the di vided shaft 6 which may be rotated in any desirable manner and which has fixed to it for rotation therewith the drum Thaving 'mneni parfiuuiza'r 'mhaaim of a '70 4; seem-v member L, but I 131% We lstrzv;

Inward the the plate 1. The car- 'I which over 90 1:. may be fax; amiable mam-1m 5n iihrs slide 3- mm? mm (-hmnbar 1s :1 Fiat 31 111*11133. ising from 0 $116 shaft 372 is the arm 34 segmental slape, the arm 34 120 in the ixmdtudinal slot 35 Wedge memb-zr 18. Disposed P1 of the slot- 35 is an anti-fric- 56 6 paratiw with the Seg- ST'. This segmental arm 34 also Ch the arm 37 attached to and derom the wit 3% situat d in and upon y that 1f th-J (3 wnrk 21153 screw; 39 130 projecting freely through a bore extending longitudinally of the carriage or slide 3 at the rear thereof, said screw being tapped through the block 40 rigid with and de pending from the lower wedge member 18.

a The function of this screw is to regulate the operating point of the swinging arm 37 by the segmental arm 34. Below the slide 3 I have shown the fixed element 41 attached by screws or otherwise to the base or bed 2 and constituting a suitable actuator for the lever or arm 33.

It will be assumed that the tool 5 has concluded its action upon the work 21, that the work has been lowered and that the carriage 3 is being drawn backward by the cam drum 7. Just before the carriage 3 completes its back or retractive stroke the lever 33 will-strike the actuator 41 and as the backward movement is completed the lever 33 will be swung toward the right in Fig. 1 so as to effect the movement of the segmental arm 34 in the opposite direction. In the dotted lines in Fig. 3 I have shown the arm 34 just at about the time the lever 33 engages the actuator 41, so that on the final backward movement of the slide 3 the arm 34 is moved from the dotted line position in Fig. 3 to the fflll line position therein, assuming the full line position when the backward movement of the carriage 3 has been concluded. As the arm 34 swings from the dotted line to the full line position it rides against the arm 37 and acting as a cam thrusts said arm 37 and therefore the wedge member 18 rearward with respect to the slide 3, the motion being completed at practically the instant the back stroke of the slide 3 is finished. As the wedge member 18 moves rearward it elevates in the manner already described the wedge member 19 so as to move the work 21 to extend above the cutting plane, this relation being maintained until the predetermined out has been made, it being clear that during the cutting action the work is non-yieldingly sustained.

As already noted, I do not rely upon the carriage 3 to effect the lowering of the work and as a consequence can complete a cut before the work is lowered. In the present case the lowering of the work is obtained through the primary agency of the cam drum 7 or by means movable therewith, the peripheral stud or projection 42 (Figs. 1 and 7 for instance) answering satisfactorily in this connection. After the work 21 has been elevated and it is shown as just in this condition in Fig. 1, the carriage 3 will be advanced by the cam drum 7 and just as the stud or anti-friction roller enters the ineffective or dwell portion 12 indicating the completion of the advance stroke of,

the carriage or slide 3, the stud or roller 42 Wlll engage the cam or angular surface 43 extending transversely of the heel portion of the lever 33 and as the drum 7 continues to rotate. the carriage at this time being at rest in its extreme advanced position, the stud or anti-friction roller 11 will traverse said dwell or ineffective portion 12, and when it enters the cam portion 15 the latter by acting against the stud 11 will cause the backward movement of the said carriage or slide. Just as the stud 11 enters the dwell or ineffective portion 12, the stud or anti-friction roller 42 will engage the low end of the cam or wedge face 43 and will ride along said face 43, leaving it just about the time the stud 11 enters the cam portion 14. \Vhile the stud 11 is riding along the dwell or ineffective portion 12, the stud or actuator 42 is in engagement with the cam or wedge surface 43, thus moving the lever 33 in the direction of the arrow 44 or rearward, the arm 34 on such motion of the lever engaging the transverse member 36 made for instance in the form of an antifriction roller and extending crosswise of the slot 35, the consequence being that as the lever 33 is moved rearward by the stud 42 and the arm 34 forward, the latter by impinging against the transverse piece 36 moves the wedge member 18 forward or toward the night in Figs. 1 and 2 and as indicated by the arrow in Fig. 2, whereby the upper wedge member 19 to which the work is practically directly fixed Will be pulled down by the plate 24 riding'along the plate 22 in the manner already described. The result is that the work 21 is lowered or caused to recede from the cutting plane just about the time the stud 11 is in readiness to enter the cam portion 14 to inaugurate the backward movement of the carriage In Fig. 8 the work 21 is supposed to be moving in the direction of the straight arrow, the tool 5 operating upon the same, the curved arrow in this view and in Fig. 9 indicating the direction of rotation of the cutter or tool. The straight arrow in Fig. 9 represents the backward movement of the work, the work at this time being below the cutting plane so that there is no possibility of the cutter injuring the work.

It is believed that the action of the machine will be clearly obvious from the fore going description, but nevertheless it is desirable to briefly set forth the same. Fig. 1 the carriage or slide 3 is assumed to be at practically the limit of its backward movement, the work 21 having been elevated iin i Liir sliiiuiiic member for an 1mm! of fin? \mrk away i'rmn tin imn tiwiy t0 Hm ii iai io mvmimr M ii iiit rrmw; point in the trawl m (h 21mm;

Hi to *7. nirmiu'r, rmrk cur-{mgr 2110MB m1: able zziv'miwr, mun for mixing ment of H10 imrk town 11.] MW moi .afiwiy to the siiziabic nicniirr at :1 3Weiirarrmiiswi point in Hi l triu'ei of said fliihhin number. :imi mwms gm'rri'iwi by said 1(? }i]n'-')442i11;3f means; fur causing the mm'rmvm oi the: work away from the toni rulntivrijv' in the siiiinbio nmn ber at :uwiher mint ii the travel thereof.

3. The cnmijinniimi 0i :1 siiiiaibic lllifl l'lijil', izmi'ns For tool in pa in: rriutizm in mmnin-r, wnri; z: 'i mean i 1i 1 able mrmben m K s for ranking 'iiir nu-nt of the work inward H213 to iihr iiiizii'iiv mmpoint in f lm {min ingz wi l sii-"iuizir mania-r, timlmi if the Q1121 fur cumin t mm? of tim work army? [mm lu;- inn! w; :mother puiivt in the travel of said slii'ianio member and rciutiwiy to the latter.

4. The (omilinntion of a siidahie member, a cam for rvripromting said hiidili ifi mrirr ber, means for supporting av ton] in operative relation to the iiiiflbifi member, work carry ing means on the sliilabio mmnber, means for causing the movement of the Work toward the two] reiativeifl' to the didniiiu menr bernt a predetermined point in the fraud therwf. and m ning :u-imimi by .wii i for causing: tip mm' mvm M! {iii} *mrg f'mm said SiitiiiiPiq mrmbm.

5. The P038,- iim 2: firing means m1 is governed by Hz number m .z'iii-miwr for naming the miwenwnf i r irvmi; hmmzd the i001 reintiveiy {in tin: Fihinii rmisiwr :1 mmbah-rminmi mini 'iQih mmniwr', and iii of the: slick Hm more in hmi xvii-iii at :zno iiirr point, in mi;

f rhm :yimi: I fro 2hr in i Minn l mime movement of H'iNIl Pk, mwm for supporting a on to and aiign'e the mum; for musing the :i.' -'z\'." i fur artion by work is rng'agzed by the rim 9ii ii1iii9 member, and vpmiiivntly of the motion FUliMPl' fur causing: the lawi'i ativviy' {0 if Siidfibit 110i at Hie i: mrhisinn of r m and aiiidaiil a member. mnnlinzitimi 9f ii. reciprraczitory mmms for supporting a rciation to said siidable m on said slid- V i sing: in a lvunce mini the i001 relax 'filb'lliiiEY brfore the for 2 :ieidingiy adv} :ijf'ifiitiflf'i. in Pi flNi fhtij 0f the or (72. sing 0t i 5 to the did i mici chm :cm'miiiiii? admin) movmnmt f raid siid- Iii i9 member.

9. The mmrinzitinn of 11 rr'cipmcatory siidnhio n'wmimr. work carrying means on said Siiliflbii immiser. mains governed by the mm'rmpnt of the slidabie member for Mimi-ting fi m mm'mnrnt of the work away from the 3%ii(iili)i( member. and means movniiiu iZllii}'MI:(ikIiH) (if the .Qiiriaiiie n'ivmber fur aim musing nmwmvnt of the work to mini Haw :-i(i:!i,-i( member at :muthr point in Hwim vi m" tin izitfer.

"" wmhi iutimn (if a; rociprocntory in Work mrryn 5: mrsms on mrmi 'i. iii-HM -11 the frame- H imi's! S Th siulzabic moi work for causing movement of the work away from the slidable member at one point in the travel thereof, and means movable independently of the slidable member for causing the movement of the work toward the slidable member at a different point in the travel of the latter.

11. The combination of a reciprocatory slidable member, work carrying means on said slidable member, means for causing a movement of the work away from the slidable member at one point in the travel thereof, operating means for the slidable member, and means actuated by said operating means for causing movement of the work toward the slidable member at another point in the travel thereof.

12. The combination of a reciprocatory slidable member, work carrying means on the slidable member, a cam for reciprocating said slidable member, by the cam for causing the motion of the work transversely to the motion of the slidable member.

13. The combination of a reciprocatory slidable member, work carrying means on said slidable member, operating means for causing the movement of the slidable memher, and means actuated by said operating means for causing a movement of the work transversely to the motion of the slidable member at a predetermined point in the movement thereof.

14. The combination of a reciprocatory slidable member, a rotary cam. the slidable member having a stud and the cam engaging said stud to effect the reciprocation of the slidable member, the cam having an inefiective portion to receive the stud approximately at the conclusion of the advance of the slidable member, work supporting means on the slidable member, and means actuated by the cam approximately at the conclusion of the advancing movement of the slidable member, for causing the movement of the work toward said slidable member.

15. The combination of a reciprocatory member, work carrying means on said recipand means actuated rocatory member, a cutting tool positioned to act on the work on the advance of the reciproeatory member, means governed by the reciprocatory member for causing the movement of the work toward the cutting tool at a predetermined point in the movement of the reciprocatory member, and means independent of the reciprocatory member for causing a movement of the work away from the tool at another point in the travel of said reeiprocatory member.

1a. The combination of a reeiprocatory slidable member, means for supportin a tool in operatise relation to said slide le member, work carrying means on the slidable member, the tool being adapted to cut the work during a predetermined time in the allvance of said slidable member, and means active independently of the motion of the slidablemember, for effecting a relative separation of the tool and the work with respect to said slidable member approximately at the conclusion of a cut to permit the work and the tool to be free of each other on the backward movement of said slidable member.

17. The combination of a reciprocatory slidable member, means for supporting a tool in operative relation to said slidable member,work carrying means on the slidable member, means for holding the work in a position away from the slidable member to permit the cutting of the work on the advance of the slidable member, and means automatically movable independently of the motion of the slidable member for efi'ecting the movement of the work toward the slidable member at approximately the conclusion of the o ieration of the tool upon the work to permit the slidable member to move backward with the work free of the tool.

In testimony whereof I affix my signature in presence of two witnesses.

BENGT M. W. HANSON.

\Vitnesses:

W. M. STORES, C. M. GELLER'I, 

